because Amazon allows anything and no quality control. someone can just re-publish Wikipedia articles as books, which a lot of people do.
- is copy pasted from another source or the internet
- respects copyright
- is written in the language it says it is
In graduate school nobody can understand each other's papers, so the colleges set up a massive list of formatting guidelines. The idea being the focus on formatting means you at least had to spend a minimum amount of effort.